The image presents a diagram of a Federated SPARQL Query, with four blue endpoints labeled "Lab A", "Lab B", "Lab C", and "Lab D", each marked with a "SPARQL" icon. Arrows connect these endpoints, and a central gray rectangle labeled "SERVICE" is surrounded by a green border. The text "Federated SPARQL Query" is at the top, and the phrase "SPARQL Client sends subqueries into each endpoint and merges the results" is at the bottom.